pve_create_lxc · Proxmox MCP: Risk & Policy

WHAT IT DOES

What pve_create_lxc does on Proxmox

AI agents use pve_create_lxc to create or update resources in Proxmox — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Proxmox environment.

WHY IT NEEDS A POLICY

Why pve_create_lxc needs a policy

Creating an LXC container is a reversible write operation that allocates compute resources and modifies the Proxmox cluster configuration. It is not destructive (the container can be deleted), not financial, and not arbitrary code execution.

From the tool's definition Tool name 'pve_create_lxc' and description 'Create an LXC container' indicate a create operation that modifies cluster state by provisioning a new container resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pve_create_lxc Rate-limited

pve_create_lxc stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pve_create_lxc": {
      "limits": [
        {
          "counter": "pve_create_lxc_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Proxmox, so you can run agents against it safely.

FAQ

Questions about pve_create_lxc

What does the pve_create_lxc tool do? +

Create an LXC container. Requires confirm=true. It is categorised as a Write tool in the Proxmox MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pve_create_lxc? +

Register the Proxmox MCP server in PolicyLayer and add a rule for pve_create_lxc: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Proxmox. Nothing to install.

What risk level is pve_create_lxc? +

pve_create_lxc is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit pve_create_lxc? +

Yes. Add a rate_limit block to the pve_create_lxc rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block pve_create_lxc completely? +

Set action: deny in the PolicyLayer policy for pve_create_lxc. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides pve_create_lxc? +

pve_create_lxc is provided by the Proxmox MCP server (plgonzalezrx8/proxmox-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.